Ezekiel 33:2

33:2 “Son of man, speak to your people, and say to them, ‘Suppose I bring a sword against the land, and the people of the land take one man from their borders and make him their watchman.

Ezekiel 33:7-9

33:7 “As for you, son of man, I have made you a watchman for the house of Israel. Whenever you hear a word from my mouth, you must warn them on my behalf. 33:8 When I say to the wicked, ‘O wicked man, you must certainly die,’ and you do not warn the wicked about his behavior, the wicked man will die for his iniquity, but I will hold you accountable for his death. 33:9 But if you warn the wicked man to change his behavior, and he refuses to change, he will die for his iniquity, but you have saved your own life.